Patents by Inventor Shubhra Jyoti Bhadra

Shubhra Jyoti Bhadra has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240001288
    Abstract: Sulfur-containing compounds are removed from crude CO2 by conversion to elemental sulfur in a Claus process and subsequently by hydrogenation of the Claus tail gas to convert residual sulfur-containing compounds into H2S which, after cooling to knock out water and then compressing, is removed, together with any other sulfur-containing impurities, either by physical separation or by chemical reaction with a solid metal oxide to form solid metal sulfide with subsequent oxidative regeneration to produce purified CO2 and a recycle gas comprising at least one sulfur-containing compound which is recycled to the Claus process. Some H2S in the Claus tail gas may be removed initially by selective and/or non-selective amine absorption(s) in a tail gas treatment unit prior to removal of residual H2S and any other residual sulfur-containing impurities by the physical separation or the chemical reaction steps.
    Type: Application
    Filed: July 1, 2022
    Publication date: January 4, 2024
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Kamlesh Ghodasara, Paul Higginbotham, Jeffrey R. Hufton, Shubhra Jyoti Bhadra, Maulik R. Shelat
  • Publication number: 20230304733
    Abstract: A hydrogen feed stream comprising one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, oxygen, and water, is purified using a cryogenic temperature swing adsorption (CTSA) process with high overall recovery of hydrogen. The waste gas from regenerating the CTSA may be used to improve the performance of upstream hydrogen processing steps.
    Type: Application
    Filed: February 8, 2022
    Publication date: September 28, 2023
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Jeffrey R. Hufton, Timothy C. Golden, Aaron Raymond Scott, Kamlesh Ghodasara, Maulik R. Shelat, Garret C. Lau
  • Publication number: 20230249119
    Abstract: A hydrogen feed stream comprising oxygen and one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, and water, is purified by first removing oxygen using a copper oxide and/or manganese oxide getter, then using a cryogenic temperature swing adsorption (CTSA) process with high overall recovery of hydrogen. The oxygen getter prevents an explosive mixture of hydrogen and oxygen from occurring in the CTSA during regeneration.
    Type: Application
    Filed: February 8, 2022
    Publication date: August 10, 2023
    Applicant: Air Products and Chemicals, Inc.
    Inventors: William J. Casteel, Jr., Garret C. Lau, Timothy C. Golden, Shubhra Jyoti Bhadra, Jeffrey R. Hufton
  • Publication number: 20230249971
    Abstract: A hydrogen feed stream comprising oxygen and one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, and water, is purified using a cryogenic temperature swing adsorption (CTSA) process with high overall recovery of hydrogen. The CTSA is regenerated using an inert gas to prevent an explosive mixture of hydrogen and oxygen from occurring.
    Type: Application
    Filed: February 8, 2022
    Publication date: August 10, 2023
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Jeffrey R. Hufton, Timothy C. Golden, Aaron Raymond Scott, Quan Min Shao, Vishrut Garg
  • Publication number: 20230249970
    Abstract: A hydrogen feed stream comprising one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, oxygen, and water, is contacted with liquid hydrogen in a cryogenic wash column (CWC) process that produces pure hydrogen with high overall recovery. The waste liquid stream leaving the CWC may be used to improve the performance of upstream hydrogen processing steps.
    Type: Application
    Filed: February 8, 2022
    Publication date: August 10, 2023
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Kamlesh Ghodasara, Maulik R. Shelat, Paul Higginbotham, Shubhra Jyoti Bhadra, Timothy C. Golden
  • Patent number: 10843121
    Abstract: Process and apparatus for producing helium, neon, or argon product gas using an adsorption separation unit having minimal dead end volumes. A purification unit receives a stream enriched in helium, neon, or argon, and a stream is recycled from the purification unit back to the adsorption separation unit in a controlled manner to maintain the concentration of the helium, neon, or argon in the feed to the separation unit within a targeted range.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: November 24, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Cory E. Sanderson, Jason Michael Ploeger, Jin Cao, Roger Dean Whitley, Shubhra Jyoti Bhadra
  • Patent number: 10835856
    Abstract: Disclosed herein are rapid cycle pressure swing adsorption (PSA) process for separating O2 from N2 and/or Ar. The processes use a carbon molecular sieve (CMS) adsorbent having an O2/N2 and/or O2/Ar kinetic selectivity of at least 5 and an O2 adsorption rate (1/s) of at least 0.2000 as determined by linear driving force model at 1 atma and 86° F.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: November 17, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Roger Dean Whitley, Shubhra Jyoti Bhadra, Erdem Arslan, Yong Cao, Timothy Christopher Golden
  • Patent number: 10744450
    Abstract: Disclosed herein are multi-bed rapid cycle pressure swing adsorption (RCPSA) processes for separating O2 from N2 and/or Ar, wherein the process utilizes at least five adsorption beds each comprising a kinetically selective adsorbent for O2 having an O2 adsorption rate (1/s) of at least 0.20 as determined by linear driving force model at 1 atma and 86° F.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 18, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Roger Dean Whitley, Timothy Christopher Golden, Dingjun Wu, Glenn Paul Wagner
  • Patent number: 10730006
    Abstract: Disclosed herein is a stator plate for a rotary bed PSA apparatus that has an exhaust slot that has first and second sections for receiving blowdown and purge exhaust gas streams, the sections being separated by a flow restriction that restricts but does not full prevent gas flow between the sections, or that has separate exhaust slots for separately receiving the blowdown and purge exhaust gas streams. Also disclosed is pressure swing adsorption (PSA) apparatus including such a stator plate, and a rotary bed PSA process using such an apparatus.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 4, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Glenn Paul Wagner, Xue Mei Liu, Jinzhong Liu, Roger Dean Whitley, Shubhra Jyoti Bhadra, Michael Jamie McKerrow
  • Patent number: 10646848
    Abstract: Disclosed herein are novel RHO zeolites useful as kinetically selective adsorbents for oxygen and/or nitrogen. The adsorbents can be used in pressure swing adsorption processes for selectively adsorbing oxygen and/or nitrogen from feed streams such as an air stream or crude argon stream. Also disclosed are novel methods of preparing RHO zeolites, including in particular mixed-cation RHO zeolites.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: May 12, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Magdalena M. Lozinska, Paul A. Wright, Elliott L. Bruce, William Jack Casteel, Jr., Shubhra Jyoti Bhadra, Robert Quinn, Garret Chi-Ho Lau, Erin Marie Sorensen, Roger Dean Whitley, Timothy Christopher Golden, Mohammad Ali Kalbassi
  • Publication number: 20200054986
    Abstract: Disclosed herein are rapid cycle pressure swing adsorption (PSA) process for separating O2 from N2 and/or Ar. The processes use a carbon molecular sieve (CMS) adsorbent having an O2/N2 and/or O2/Ar kinetic selectivity of at least 5 and an O2 adsorption rate (1/s) of at least 0.2000 as determined by linear driving force model at 1 atma and 86° F.
    Type: Application
    Filed: August 14, 2018
    Publication date: February 20, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Roger Dean Whitley, Shubhra Jyoti Bhadra, Erdem Arslan, Yong Cao, Timothy Christopher Golden
  • Publication number: 20200054988
    Abstract: Disclosed herein is a stator plate for a rotary bed PSA apparatus that has an exhaust slot that has first and second sections for receiving blowdown and purge exhaust gas streams, the sections being separated by a flow restriction that restricts but does not full prevent gas flow between the sections, or that has separate exhaust slots for separately receiving the blowdown and purge exhaust gas streams. Also disclosed is pressure swing adsorption (PSA) apparatus including such a stator plate, and a rotary bed PSA process using such an apparatus.
    Type: Application
    Filed: August 14, 2018
    Publication date: February 20, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Glenn Paul Wagner, Xue Mei Liu, Jinzhong Liu, Roger Dean Whitley, Shubhra Jyoti Bhadra, Michael Jamie McKerrow
  • Publication number: 20200054987
    Abstract: Disclosed herein are multi-bed rapid cycle pressure swing adsorption (RCPSA) processes for separating O2 from N2 and/or Ar, wherein the process utilizes at least five adsorption beds each comprising a kinetically selective adsorbent for O2 having an O2 adsorption rate (1/s) of at least 0.20 as determined by linear driving force model at 1 atma and 86° F.
    Type: Application
    Filed: August 14, 2018
    Publication date: February 20, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Roger Dean Whitley, Timothy Christopher Golden, Dingjun Wu, Glenn Paul Wagner
  • Patent number: 10343139
    Abstract: Disclosed herein are new processes for adsorbing oxygen using adsorbent compositions comprising RHO zeolites kinetically selective for oxygen. The RHO zeolites can be used in pressure swing adsorption processes for separating oxygen from oxygen containing streams, such as for, but not limited to, purifying a crude argon feed stream or separating oxygen from an air feed stream.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: July 9, 2019
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Roger Dean Whitley, William Jack Casteel, Jr., Timothy Christopher Golden, Garrett Chi-Ho Lau, Erin Marie Sorensen, Robert Quinn, Magdalena M. Lozinska, Paul A. Wright, Mohammad Ali Kalbassi
  • Publication number: 20190201835
    Abstract: Process and apparatus for producing helium, neon, or argon product gas using an adsorption separation unit having minimal dead end volumes. A purification unit receives a stream enriched in helium, neon, or argon, and a stream is recycled from the purification unit back to the adsorption separation unit in a controlled manner to maintain the concentration of the helium, neon, or argon in the feed to the separation unit within a targeted range.
    Type: Application
    Filed: January 18, 2019
    Publication date: July 4, 2019
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Cory E. Sanderson, Jason Michael Ploeger, Jin Cao, Roger Dean Whitley, Shubhra Jyoti Bhadra
  • Publication number: 20190091651
    Abstract: Disclosed herein are new processes for adsorbing oxygen using adsorbent compositions comprising RHO zeolites kinetically selective for oxygen. The RHO zeolites can be used in pressure swing adsorption processes for separating oxygen from oxygen containing streams, such as for, but not limited to, purifying a crude argon feed stream or separating oxygen from an air feed stream.
    Type: Application
    Filed: September 28, 2017
    Publication date: March 28, 2019
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Roger Dean Whitley, William Jack Casteel, JR., Timothy Christopher Golden, Garrett Chi-Ho Lau, Erin Marie Sorensen, Robert Quinn, Magdalena M. Lozinska, Paul A. Wright, Mohammad Ali Kalbassi
  • Publication number: 20190091652
    Abstract: Disclosed herein are novel RHO zeolites useful as kinetically selective adsorbents for oxygen and/or nitrogen. The adsorbents can be used in pressure swing adsorption processes for selectively adsorbing oxygen and/or nitrogen from feed streams such as an air stream or crude argon stream. Also disclosed are novel methods of preparing RHO zeolites, including in particular mixed-cation RHO zeolites.
    Type: Application
    Filed: September 28, 2017
    Publication date: March 28, 2019
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Magdalena M. Lozinska, Paul A. Wright, Elliott L. Bruce, William Jack Casteel, JR., Shubhra Jyoti Bhadra, Robert Quinn, Garret Chi-Ho Lau, Erin Marie Sorensen, Roger Dean Whitley, Timothy Christopher Golden, Mohammad Ali Kalbassi
  • Patent number: 9808755
    Abstract: Methods and apparatuses for separating CO2 and sulfur-containing compounds from a synthesis gas obtained from gasification of a carbonaceous feedstock. The primary separating steps are performed using a sour pressure swing adsorption (SPSA) system, followed by an acid gas enrichment system and a sulfur removal unit. The SPSA system includes multiple pressure equalization steps and a rinse step using a rinse gas that is supplied from a source other than directly from one of the adsorber beds of the SPSA system.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: November 7, 2017
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Andrew David Wright, Jeffrey Raymond Hufton, Jeffrey William Kloosterman, Fabrice Amy, Edward Landis Weist, Jr.
  • Patent number: 9708188
    Abstract: Methods and systems for purifying argon from a crude argon stream are disclosed, employing pressure swing adsorption at cold temperatures from ?186° C. to ?20° C.; more preferably from ?150° C. to ?50° C.; and most preferably from ?130° C. to ?80° C. with oxygen-selective zeolite adsorbent. In some embodiments, the oxygen-selective zeolite adsorbent is a 4A zeolite, a chabazite, or a combination thereof.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: July 18, 2017
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Roger Dean Whitley, Garret Chi-Ho Lau, David Ross Graham, Donn Michael Herron, Qiao Zhao, Erin Marie Sorensen
  • Publication number: 20170021301
    Abstract: Methods and apparatuses for separating CO2 and sulfur-containing compounds from a synthesis gas obtained from gasification of a carbonaceous feedstock. The primary separating steps are performed using a sour pressure swing adsorption (SPSA) system, followed by an acid gas enrichment system and a sulfur removal unit. The SPSA system includes multiple pressure equalization steps and a rinse step using a rinse gas that is supplied from a source other than directly from one of the adsorber beds of the SPSA system.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Shubhra Jyoti Bhadra, Andrew David Wright, Jeffrey Raymond Hufton, Jeffrey William Kloosterman, Fabrice Amy, Edward Landis Weist, JR.